Why is a genetically diverse population more likely to survive a change to the environment?

A genetically diverse population is more likely to survive a change to the environment because genetically diverse organisms have a broad variety of traits. The more traits they have, the more likely it is those traits can be utilized in the new environment. If all the organisms had the same genes, then it is less likely for them to survive a change in the environment because if they all have poor genes that cannot be utilized in the new environment, they will all die.